This museum in San Francisco's Chinatown is one of the oldest and largest archives of Chinese American history and culture.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Once owned by the largest employer in Colorado, these ovens have been abandoned for over a century.

This was once the home of Gahan's Saloon, Denver's most storied speakeasy.

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

At 207 feet, one of the world's longest continuous escalators.

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

The narrowest house in America is seven feet of pure spite.

It was once the base for a series of domestic terror attacks.

Dedicated to the man who created the first radio wave communication system.

This bridge over D.C.'s Rock Creek Park is sometimes called the "Buffalo Bridge" because of its four buffalo sculptures, which were cast from a single piece of bronze.

Surrounded by a verdant garden and a backdrop of ivy, a monument to beloved poet Khalil Gibran stands outside of the Lebanese embassy.

The story behind this beloved toy—named for Theodore Roosevelt and owned by his grandson—is more complicated than you might guess.

Corn-inthian columns with a uniquely American take on neoclassical architecture.

This fertility idol of questionable authenticity inspired an iconic Indiana Jones artifact.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

A haunting tribute to pioneering photographer Clover Adams.

The house where John Wilkes Booth conspired with his co-conspirators.